Levels of Organization Levels of Organization Living things

Levels of Organization Living things are very complex, and multicellular organisms contain a variety

Molecules All matter is made of atoms, molecules and ions. This includes all of

Organelles Inside cells, organic molecules serve many functions and are even be used to

Cells All living things are made of cells. Cells are the simplest structures that

Tissues In multicellular organisms, cells begin to specialize as they multiply and develop. This

Tissues Specialized cells multiply into groups of specialized cells as the organism grows. Groups

Organs Brain Heart Liver Large Intestine Organs are a collection of tissues that serve

Organ Systems Some jobs, like breathing in and out or digesting a meal, require

Organ Systems Organ systems, also called body systems, rely on all of the tissues

Organism An organism is a complete living thing. Multicellular organisms are incredibly complex creatures.

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Levels of Organization

Levels of Organization Living things are very complex, and multicellular organisms contain a variety of tissues, organs and systems that allow them to meet the demands of life. Multicellular means made of many cells.

Molecules All matter is made of atoms, molecules and ions. This includes all of the biotic and abiotic factors in an ecosystem. In living things, many of these molecules are classified as organic; they are based on the element carbon. All 4 classes of biomolecules are organic compounds. Proteins Carbohydrates Lipids Nucleic Acids

Organelles Inside cells, organic molecules serve many functions and are even be used to build organelles. These organelles are the structures found inside of the cell that allow cells to perform a variety of cellular processes. Cytoskeleton

Cells All living things are made of cells. Cells are the simplest structures that can be classified as living. Cells contain everything that is needed for life, and there are many forms of single-celled organisms that live all around us.

Tissues In multicellular organisms, cells begin to specialize as they multiply and develop. This happens because cells express different genes so that they can do specific jobs in the body.

Tissues Specialized cells multiply into groups of specialized cells as the organism grows. Groups of specialized cells are called tissues. Nervous Tissue

Organs Brain Heart Liver Large Intestine Organs are a collection of tissues that serve a common function. Being made of different tissues allows organs to complete complex tasks for the body. Organs rarely do just one thing. Because they are complex they have more than one role in the body.

Organ Systems Some jobs, like breathing in and out or digesting a meal, require more than one organ to work together. Groups of organs that work together are called organ systems.

Organ Systems Organ systems, also called body systems, rely on all of the tissues and organs in the system working together to fill the needs of each cell and maintain homeostasis.

Organism An organism is a complete living thing. Multicellular organisms are incredibly complex creatures. They are able to survive because of well organized systems full of organs and tissues that allow them to meet the needs of every cell. Simple Complex